module.exports = function Article(id = null, title = '', date = '', link = '', content_full = '', content_short = '', img = '', author = '', comments = '', tag = '', top_part = '', subtype = '', editor = '', keywords = '', copyright = '') {
    this.id = id;
    this.title = title;
    this.date = date;
    this.link = link;
    this.content_full = content_full||"";
    this.content_short = content_short;
    this.img = img;
    this.author = author;
    this.comments = comments;
    this.tag = tag;
    this.top_part = top_part;
    this.subtype = subtype;
    this.editor = editor;
    this.keywords = keywords;
    this.copyright = copyright;
}
// 关键赋值时为undefined还是会出错